Method: Delete draft orders older than a day in batches of 20.

Method: Since it’s possible for third party code to clobber the `$wp_post_statuses` global, we need to do a final check here to make sure the draft post status is registered with the global so that it is not removed by WP_Query status validation checks.

Method: Asserts whether incoming order results are expected given the query this service class executes.

Method: Register custom order status for orders created via the API during checkout.

Method: Register custom order post status for orders created via the API during checkout.

Method: Returns the properties of this post status for registration.

Method: Remove draft status from the ‘status’ argument of an $args array.

Method: Append draft status to a list of statuses.

Method: Constructor